<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        p
        {
            border:1px solid red;
            outline: green dotted thick;
        }
    </style>
</head>
<body>
<p>
    This is a duoluo
</p>
</body>
</html>